ajax传的参数为什么为空？？？？ - Java / J2ME

问题如题。
Ajax的代码:
JScript code:


function getProfession2(){
var department=document.getElementById("department").value;
alert(department+"-----"+$("#department").val());

var request=$.ajax({
type:"post",
url:"<%=basePath%>huiyuan.do?cmd=getMajors",
contentType:"application/x-www-form-urlencoded",
data:"department="+$("#department").val(),
success:function(){

var text=request.responseText;
$("#select_major").html(text);

}

});

}





Java code:



[code=HTML]

<html:select property="tyschoolinfo.department" onchange="getProfession2()" styleId="department">





Action代码：

public ActionForward getMajors(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
String department=request.getParameter("department&